Add script tag only if used

znz · znz · commit 488d1e635c6e · 2019-03-10T22:19:24.000+09:00
diff --git a/exe/rubydown b/exe/rubydown
@@ -14,14 +14,18 @@ end
 
 class EvalDoc < Kramdown::Document
   attr_accessor :context, :stdout
+  attr_reader :javascripts
 
   def initialize(text, *opts)
     super(text, *opts)
 
+    @javascripts = {}
     self.context = get_context
     self.root = scan_el(self.root)
   end
 
+  REQUIREJS_SCRIPT_TAG = '<script src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.6/require.min.js"></script>'
+
   private
   def scan_el(el)
     new_children = []
@@ -34,6 +38,7 @@ class EvalDoc < Kramdown::Document
       if is_code && child_el.options[:lang] == 'ruby'
         code = child_el.value.gsub(/^ *ruby *\n/, '')
         new_children << eval_and_elementize(code)
+        @javascripts[:requirejs] ||= REQUIREJS_SCRIPT_TAG
       end
     end
 
diff --git a/templates/template.html.erb b/templates/template.html.erb
@@ -16,7 +16,7 @@
         display: none;
       }
     </style>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.6/require.min.js"></script>
+    <%= doc.javascripts.values.join('') %>
   </head>
   <body>
     <article class='markdown-body'>

Original file line number	Diff line number	Diff line change
`@@ -16,7 +16,7 @@`
`16`	`16`	`display: none;`
`17`	`17`	`}`
`18`	`18`	`</style>`
`19`		`- <script src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.6/require.min.js"></script>`
	`19`	`+ <%= doc.javascripts.values.join('') %>`
`20`	`20`	`</head>`
`21`	`21`	`<body>`
`22`	`22`	`<article class='markdown-body'>`